REGULATORY (Details)	Oct. 24, 2017 Bcf	Apr. 24, 2017	Jan. 06, 2017 item	Oct. 31, 2017
Great Lakes Settlement | FERC
Regulatory Matters
Settlement rate reduced (as a percent)				27.00%
Great Lakes Settlement | NEB | Maximum
Regulatory Matters
Transportation capacity per day | Bcf	0.711
Great Lakes Contracting | NEB
Regulatory Matters
Term of contract		10 years
Termination options beginning		3 years
North Baja Pipeline, LLC | FERC
Regulatory Matters
Number of compression units | item			2